prokaryotes
zooplankton
eukaryotes
phytoplankton
plants
aquatic (water-living)
microscopic
drifting or wandering
To see in the dark
Just for fun
To scare away predators
To attract a mate
it makes the water more acidic.
it kills large predators like sharks.
it makes the water saltier.
A few dozen cells
Millions of cells
Hundreds of cells
Thousands of cells
Zooplankton are tiny animals.
algae
the ocean
All plankton are microscopic (too small to see without a microscope).